Exercises

Hazardous operations 030900Z to 031718Z oct, alternate 0900Z to 1718Z daily 04 thru 17 oct in areas bound…

North Pacific Ocean · HYDROPAC 3093/23

What this record establishes

Archived notice · 2023-10-12 15:20Z

This notice comes from the historical archive. Its archived status does not establish when or how the reported situation ended.

Source and dates
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · RTS SAFETY KWAJALEIN MH 0/23 062355Z SEP 23.. Issued 2023-09-28 09:40Z. First collected 2026-08-17 13:38Z; last seen in collection 2026-08-17 15:46Z. Collection dates record ingestion, not a new incident or a fresh field observation.
Location covered
North Pacific Ocean. The map shows an area described by the warning; the listed coordinate is its representative center. Check the original wording for limits and qualifications.

Related notices and cancellation links

Current notices and reporting history in the North Pacific Ocean →

Activity windows · 15 in this warning

opens (UTC)closes (UTC)locallength
2023-10-03 09:00Z2023-10-03 17:18Z—8 h 18
2023-10-04 09:00Z2023-10-04 17:18Z—8 h 18
2023-10-05 09:00Z2023-10-05 17:18Z—8 h 18
2023-10-06 09:00Z2023-10-06 17:18Z—8 h 18
2023-10-07 09:00Z2023-10-07 17:18Z—8 h 18
2023-10-08 09:00Z2023-10-08 17:18Z—8 h 18
2023-10-09 09:00Z2023-10-09 17:18Z—8 h 18
2023-10-10 09:00Z2023-10-10 17:18Z—8 h 18
… 7 more

Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.

issued
2023-09-28 09:40Z
status
Archived notice
self-cancels
2023-10-17 18:18Z
authority
RTS SAFETY KWAJALEIN MH 0/23 062355Z SEP 23.
issued by
RTS SAFETY KWAJALEIN MH
sea
North Pacific Ocean
position
15.967, 172.232
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

NORTH PACIFIC.
MARSHALL ISLANDS.
DNC 12, DNC 13.
1. HAZARDOUS OPERATIONS 030900Z TO 031718Z OCT,
   ALTERNATE 0900Z TO 1718Z DAILY 04 THRU 17 OCT
   IN AREAS BOUND BY:
   A. 21-38.00N 174-33.00E, 21-35.00N 176-26.00E,
      20-16.00N 177-20.00E, 16-32.00N 175-32.00E,
      12-50.00N 172-38.00E, 10-11.00N 168-55.00E,
      07-51.00N 167-19.00E, 08-27.00N 166-12.00E,
      11-02.00N 167-41.00E, 14-27.00N 169-18.00E,
      17-36.00N 170-18.00E, 20-05.00N 171-58.00E.
   B. 25-58.00N 178-58.00E, 25-48.00N 178-30.00E,
      25-18.00N 178-22.00E, 25-11.00N 178-42.00E,
      25-31.00N 179-02.00E.
2. CANCEL THIS MSG 171818Z OCT 23.

Reading this warning

DNC (Digital Nautical Chart)
A reference to one of the regions of NGA's Digital Nautical Chart, used to tell the reader which charts a warning affects.
Hazardous operations
NGA's heading for activities that make an area dangerous — most often rocket launches, space debris and weapons firings, and some open-ended danger areas.
Date-time group (DTG)
A compact UTC timestamp — day, hour and minute followed by Z — such as 201500Z for the 20th at 15:00 UTC.
Area bound by
Introduces a list of positions that are the corners of an area — the polygon the warning applies to.
Position (degrees and minutes)
How warnings write positions: degrees, a hyphen, then minutes, with N/S and E/W — 49-40.8N 003-43.8W.
CANCEL THIS MSG
The warning's own expiry: a line telling the reader when the message cancels itself.

All warning terms →

Collected reports in this area · military exercises

21 within 180 nm since 1999 · 0 in the last 12 months · 0 listed in force now

99
00
05
10
15
20
23

Counts include repeat notices about the same situation. NGA archive coverage ends 2024-05; live collection began 2026-08-17. The period between them is incomplete. An empty year is not evidence that no hazards occurred.

Month of issue in the collected archive

J
F
M
A
M
J
J
A
S
O
N
D

All available years combined. Uneven collection and repeat bulletins affect these counts; this chart does not measure the seasonality or probability of incidents.

Nearby notices listed in force · within 120 nm

No other collected notice is currently listed in force within this radius. This does not establish safe conditions.

Worldwide in the collected sources

28 military exercises listed in force · see all

Record snapshot 2026-10-02 04:35Z; source collection times vary.

Exercises

Gunnery, firing and naval exercise areas. All current military exercises →

Not for navigation. This is a re-rendering of an official navigational warning for awareness; mariners must use official NAVAREA broadcasts and their national MSI service.